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<html lang="en-us"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta charset="UTF-8"><meta name="copyright" content="(C) Copyright 2020"><meta name="DC.rights.owner" content="(C) Copyright 2020"><meta name="DC.type" content="reference"><meta name="description" content="This topic lists each error message generated by the toolkit and provides additional information that might be helpful in understanding and resolving the error condition. If your toolkit installation includes custom plug-ins that define additional messages, you can add to this list by rebuilding the DITA-OT documentation."><meta name="DC.format" content="HTML5"><meta name="DC.identifier" content="errormessages"><meta name="DC.language" content="en-US"><link rel="stylesheet" type="text/css" href="../css/commonltr.css"><link rel="stylesheet" type="text/css" href="../css/dita-ot-doc.css"><title>DITA-OT error messages</title></head><body id="errormessages"><header role="banner"><div class="header">
  <p>DITA Open Toolkit</p>
  <hr>
</div></header><nav role="toc"><ul></ul></nav><main role="main"><article role="article" aria-labelledby="ariaid-title1">
  <h1 class="title topictitle1" id="ariaid-title1">DITA-OT error messages</h1>
  
  <div class="body refbody"><p class="shortdesc">This topic lists each error message generated
    by the toolkit and provides additional information that might be helpful in understanding and resolving the error
    condition. If your toolkit installation includes custom plug-ins that define additional messages, you can add to
    this list by rebuilding the DITA-OT documentation.</p>
    <section class="section" id="errormessages__overview">
      <p class="p">Each message ID is composed of a message prefix, a message number, and a letter that indicates the severity
        level (I, W, E, or F). </p>
      <p class="p">The toolkit uses the following severity scale:</p>
      <dl class="dl" id="errormessages__severity-levels">
        
          <dt class="dt dlterm">Info (I)</dt>
          <dd class="dd">Informational messages highlight the progress of transformation and call attention to conditions of which
            you should be aware. For example, draft comments are enabled and will be rendered in the output.</dd>
        
        
          <dt class="dt dlterm">Warning (W)</dt>
          <dd class="dd">The toolkit encountered a problem that should be corrected. Processing will continue, but the output might
            not be as expected.</dd>
        
        
          <dt class="dt dlterm">Error (E)</dt>
          <dd class="dd">The toolkit encountered a more severe problem, and the output is affected. For example, some content is
            missing or invalid, or the content is not rendered in the output</dd>
        
        
          <dt class="dt dlterm">Fatal (F)</dt>
          <dd class="dd">The toolkit encountered a severe condition, processing stopped, and no output is generated.</dd>
        
      </dl>
      <p class="p">Plug-ins may be used to add additional messages to the toolkit; for more information, see
        <a class="xref" href="rebuilding-docs.html" title="When you add or remove plug-ins, you can rebuild the documentation to update the information on the extension points, messages, and parameters that are available in your environment.">Rebuilding the DITA-OT documentation</a>.</p>
    </section>
    <table class="simpletable"><colgroup><col style="width:100%"></colgroup><thead><tr class="sthead">
        <th class="stentry" scope="col" id="errormessages__stentry__1">Individual cells in this table may be used to push additional explanations for any existing error
          message into the generated message topic.</th>
      </tr></thead><tbody><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">To add additional explanation to any message, add the explanation to this table in a single cell, and
          set the following attributes on the <code class="keyword markupname xmlelement">&lt;stentry&gt;</code> tag:
          <ul class="ul">
            <li class="li"><code class="ph codeph">conkeyref="error-messages/MESSAGEID-extra"</code> -- for example, use the following to add
              additional info to message DOTX001F: <code class="ph codeph">conkeyref="error-messages/DOTX001F-extra"</code></li>
            <li class="li"><code class="ph codeph">conaction="pushreplace"</code></li>
          </ul></td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">Default transformation types that
          ship with the toolkit include dita, eclipsehelp, html5, htmlhelp, markdown variants, pdf (or pdf2), and xhtml.
          Additional transformation types may be available if toolkit plug-ins are installed.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">The input parameter was not
          specified, so there is no DITA or DITAMAP file to transform. Ensure the parameter is set properly; see
          <a class="xref" href="../parameters/parameters-base.html" title="Certain parameters apply to all transformations that DITA Open Toolkit supports.">DITA-OT common parameters (args.input)</a> if you are unsure how to specify
          the input file.
          
        </td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">An alternate stylesheet was specified
          to run in place of the default XSLT output process, but that stylesheet could not be loaded. Please correct
          the parameter to specify a valid stylesheet.
          </td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">This optional parameter is used to
          set an extension for DITA topic documents in the temporary processing directory. Only "dita", ".dita", "xml",
          or ".xml" are allowed.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">If the CSSPATH uses an absolute path,
          it should be one that can still be accessed after the files are moved to another system (such as
            <code class="ph codeph">http://www.example.org/</code>). Absolute paths on the local file system will be broken if the
          content is moved to a new system.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">The running footer file, which
          contains content to be added to the bottom of each XHTML output topic, cannot be located or read. This is
          usually caused by a typo in the parameter value. You should also ensure that the value is not specified with
          "file:" as a prefix.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">The running header file, which
          contains content to be added to the top of each XHTML output topic, cannot be located or read. This is usually
          caused by a typo in the parameter value. You should also ensure that the value is not specified with "file:"
          as a prefix.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">The running heading file, which
          contains content to be added to the <code class="keyword markupname xmlelement">&lt;head&gt;</code> section of each HTML output topic, cannot be
          located or read. This is usually caused by a typo in the parameter value. You should also ensure that the
          value is not specified with "file:" as a prefix.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">An alternate stylesheet was specified
          to run in place of the default XSL-FO output process, but that stylesheet could not be loaded. Please correct
          the parameter to specify a valid stylesheet.</td>
      </tr><tr class="strow">
        
        <td class="stentry" headers="errormessages__stentry__1">According to the OASIS DITA
          Specification, the <code class="keyword markupname xmlelement">&lt;index-see&gt;</code> element should be ignored if the parent
            <code class="keyword markupname xmlelement">&lt;indexterm&gt;</code> contains other <code class="keyword markupname xmlelement">&lt;indexterm&gt;</code> children.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">According to the OASIS DITA
          Specification, the <code class="keyword markupname xmlelement">&lt;index-see-also&gt;</code> element should be ignored if the parent
            <code class="keyword markupname xmlelement">&lt;indexterm&gt;</code> contains other <code class="keyword markupname xmlelement">&lt;indexterm&gt;</code> children.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">Please ensure that the input file
          path and file name were entered correctly.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1"></td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">The transform was unable to create
          files properly during the transform; results may not be as expected.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">This message may indicate an invalid
          input file (such as accidentally specifying a PDF file as input rather than a DITA map file), an input file
          that uses elements which are not allowed, are not part or a DITA file that has errors and cannot be parsed as
          XML. You could also be using a specialized DITA document type that needs external plug-ins in order to be
          parsed correctly. The message issued by the XML parser should provide additional information to help diagnose
          the cause.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">This message may indicate a reference
          to an invalid file (such as accidentally referencing a PDF or unknown XML file as if it was DITA), a
          referenced file that uses elements which are not allowed, or a referenced DITA file that has errors and cannot
          be parsed as XML. You could also be using a specialized DITA document type that needs external plug-ins in
          order to be parsed correctly. The message issued by the XML parser should provide additional information to
          help diagnose the cause.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">An empty
            <code class="keyword markupname xmlelement">&lt;indexterm&gt;</code> element was found, and will appear in the index as ***. This index term
          should be removed from the source.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">This will appear when one installed
          plug-in requires another in order to function correctly, but the required plug-in is not found. The installed
          plug-in will be ignored.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">This may appear if filter conditions
          on the root element of a topic cause the entire topic to be filtered out. To remove this message, you could
          place any filter conditions on the reference to this file, which will prevent the build from accessing this
          file.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">Either the input file or the ditaval
          file should change, otherwise your build is explicitly excluding all content.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">Check whether the image exists in the
          source location or already exists in the output directory.
          
        </td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">This message should only appear in
          the following cases:
          <ul class="ul">
            <li class="li">Errors earlier in the transform prevented this step of the transform from running; correct any errors
              and try the build again.</li>
            <li class="li">An Ant build or plug-in is directly calling the toolkit’s topic merge module, and is doing so
              improperly; in this case the Ant build or plug-in needs to be fixed.</li>
            <li class="li">In the past, problems have been encountered when calling this module with an absolute path; this should
              no longer be an issue, but may be fixed in older releases by updating the Ant build or plug-in.</li>
          </ul></td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">This message should only appear if an
          Ant build or plug-in is directly calling the toolkit’s topic merge module, or if earlier errors resulted in
          problems with some of the content. If the topic merge module is called correctly, then this indicates a
          program error that should be reported to the DITA-OT development team via the
          <a class="xref" href="https://github.com/dita-ot/dita-ot/issues" target="_blank" rel="external noopener">GitHub issues tracker</a>. </td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">When referencing a non-DITA file, the
          format attribute should indicate the type of file referenced (such as "html" for HTML topics or "pdf" for PDF
          files). Otherwise, the transform may attempt to parse the referenced document as a DITA topic.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">The domains attribute is used in
          specialized DITA documents to help determine which domain elements are legal. This message will only appear if
          a DITA specialization was not defined properly.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">All specialized DITA elements must
          define a class attribute to provide ancestry information. This message will only appear if a specialized DITA
          element did not define a class attribute, or if non-DITA elements are included in a DITA context.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">This informational message is
          intended to help you catch filter conditions that may have been specified improperly; if the value is correct,
          no action is needed.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1"></td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">DITA processing is based on class
          attributes defined for every element. Usually these are defaulted in the DTD or Schema; if no DTD or Schema is
          used, the class attributes must be explicitly included in the map or topic.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">This will appear when a topic is
          outside the scope of the map; for example, if the main input map references
            <span class="ph filepath">"../other-directory/some.dita"</span>. The result would cause an output file to be created
          outside of the output directory. See
          <a class="xref" href="../parameters/parameters-base.html" title="Certain parameters apply to all transformations that DITA Open Toolkit supports.">DITA-OT common parameters (outer.control and generate.copy.outer)</a> for
          details.
          
        </td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">This will appear when a topic is
          outside the scope of the map; for example, if the main input map references
            <span class="ph filepath">"../other-directory/some.dita"</span>. The result would cause an output file to be created
          outside of the output directory. If you do not want to see the warning message, please use the Ant parameter
          'outer.control', and set the value to "quiet". Otherwise, move the referenced file into the input dita/map
          directory. See
          <a class="xref" href="../parameters/parameters-base.html" title="Certain parameters apply to all transformations that DITA Open Toolkit supports.">DITA-OT common parameters (outer.control and generate.copy.outer)</a> for
          details.
          </td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">DITA processing is based on class
          attributes defined for every element. Usually these are defaulted in the DTD or Schema; if validation against
          the DTD or Schema is turned off, the class attributes must be explicitly included in the map or
          topic.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">This appears to indicate an error in
          creating specialized metadata elements. Please verify that the document type you are using is complete and
          complies with DITA Specialization rules.
          
        </td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">Please see the topic on
          <a class="xref" href="http://docs.oasis-open.org/dita/dita/v1.3/os/part1-base/langRef/attributes/theconactionattribute.html#theconactionattribute" target="_blank" rel="external noopener">Conref Push</a> in the DITA specification for details on expected syntax
          for this function.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">Please see the topic on
          <a class="xref" href="http://docs.oasis-open.org/dita/dita/v1.3/os/part1-base/langRef/attributes/theconactionattribute.html#theconactionattribute" target="_blank" rel="external noopener">Conref Push</a> in the DITA specification for details on expected syntax
          for this function.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">The conref attribute must be a URI
          reference to a DITA element. Please see the topic on
          <a class="xref" href="http://docs.oasis-open.org/dita/dita/v1.3/os/part1-base/archSpec/base/uri-based-addressing.html#uri-based-addressing" target="_blank" rel="external noopener">URI-based addressing</a> in the DITA specification for details on the
          expected syntax.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">The conref push function was used to
          replace a single element with two or more alternatives. Only one element may directly replace another using
          conref push. See
          <a class="xref" href="http://docs.oasis-open.org/dita/dita/v1.3/os/part1-base/langRef/attributes/theconactionattribute.html#theconactionattribute" target="_blank" rel="external noopener">Conref Push</a> in the DITA specification for more information about the
          conref push "replace" function.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">The target for a conref push action
          does not exist; please make sure that the syntax is correct and that the target exists. See the topic on
          <a class="xref" href="http://docs.oasis-open.org/dita/dita/v1.3/os/part1-base/archSpec/base/uri-based-addressing.html#uri-based-addressing" target="_blank" rel="external noopener">URI-based addressing</a> in the DITA specification for details on the
          expected syntax. If the syntax is correct, it is possible that the target was filtered out of your build using
          a DITAVAL file.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">Please see the topic on
          <a class="xref" href="http://docs.oasis-open.org/dita/dita/v1.3/os/part1-base/langRef/attributes/theconactionattribute.html#theconactionattribute" target="_blank" rel="external noopener">Conref Push</a> in the DITA specification for details on expected syntax
          for this function.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">This informational message is
          intended to help you catch catch duplicate key definitions; if the keys are defined as expected, no action is
          needed.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">See
          <a class="xref" href="http://docs.oasis-open.org/dita/dita/v1.3/os/part1-base/langRef/attributes/theconkeyrefattribute.html#theconkeyrefattribute" target="_blank" rel="external noopener">the conkeyref definition</a> for details on expected syntax and
          usage.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">This message is intended to help you
          locate incorrectly specified keys; if the key was specified correctly, this message may be ignored.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">A DITA Subject Scheme map was used to
          limit values that are available to the specified attribute. Please correct the attribute so that it uses one
          of the allowed values.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">The Eclipse index will contain a
          value such as "See also otherEntry", but otherEntry does not exist in this index. The index reference will be
          broken unless this plug-in is <em class="ph i">always</em> loaded into Eclipse with another plug-in that defines otherEntry
          as an index term.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">The target for a coderef element,
          which specifies an external text-based file, could not be located or loaded. Please verify that the reference
          is correct.
          <p class="p">Note that for security reasons, references to code samples outside of the scope of the map directory are
            not supported by default, as this could allow a reference to access and display any restricted or hidden
            file on the system. If you are certain that the path is valid and the file should be loaded, the current
            workaround is to set a parameter to allow these references. See
            <a class="xref" href="../parameters/parameters-base.html" title="Certain parameters apply to all transformations that DITA Open Toolkit supports.">DITA-OT common parameters (outer.control and generate.copy.outer)</a> for
            details.
            </p></td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">DITA-OT supports a special syntax on
          coderef elements to specify the character set of the target document. See
          <a class="xref" href="../reference/extended-functionality.html" title="DITA-OT provides additional processing support beyond that which is mandated by the DITA specification. These extensions can be used to define character encodings or line ranges for code references, normalize indendation, add line numbers or display whitespace characters in code blocks.">Extended codeblock processing</a> for details on the expected syntax.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">By default, DITA-OT supports the
          extensions "dita" and "xml" for DITA topics, as mandated by the DITA specification. Please verify that your
          topics use one of these extensions, or configure the toolkit to allow additional extensions.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">This message indicates that the
            <code class="keyword markupname xmlatt">@href</code> value specified in <var class="keyword varname">%1</var> does not use proper URI syntax. This may
          occur when <code class="keyword markupname xmlatt">@href</code> includes characters that should be escaped (such as the space character,
          which should be <code class="ph codeph">%20</code> when in a URI). In strict processing mode this will cause a build
          failure; in other processing modes the build will continue using the value in <var class="keyword varname">%2</var>.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">A conref "mark" action has been used
          to mark a target element without a corresponding content reference target. This may occur when the order of
          the "mark" element and the pushed element is reversed.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">
          <p class="p">A circular reference was found in key definitions: a series of key references where the last key references
            the first.</p>
          <p class="p">This may occur if a <code class="keyword markupname xmlelement">&lt;topicref&gt;</code> element contains both a key name in the
              <code class="keyword markupname xmlatt">@keys</code> attribute and a reference to the same key in the <code class="keyword markupname xmlatt">@keyref</code> attribute,
            or if a <code class="keyword markupname xmlatt">@keyref</code> attribute points to a key that refers back to the referencing element.</p>
          <p class="p">To resolve this issue, change the target of the <code class="keyword markupname xmlatt">@keyref</code> so the key is defined by pointing
            to a resource other than itself.</p>
        </td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">
          <p class="p">When a <code class="keyword markupname xmlatt">@class</code> attribute does not use the expected syntax, this usually indicates that
              <code class="keyword markupname xmlatt">@class</code> has been explicitly set on a DITA element. The attribute should be removed from the
            document so that the expected default value can be automatically used.</p>
          <p class="p">If this is a non-DITA element, it needs to be placed inside a <code class="keyword markupname xmlelement">&lt;foreign&gt;</code> element so
            that is not validated against DITA rules.
            
          </p>
        </td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">
          <p class="p">Ensure that the DITAVAL file exists. If more than one DITAVAL file is specified, ensure that the paths are
            delimited using the file path separator character appropriate for your operating system (semicolon
              ‘<code class="ph codeph">;</code>’ on Windows, or colon ‘<code class="ph codeph">:</code>’ on macOS or Linux).</p>
        </td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">This build uses generated text, such
          as the phrase "Related information" (which is generated above many link groups). The toolkit was unable to
          locate the string <var class="keyword varname">%1</var> for your specified language, so the string will appear in the default
          language. This generally indicates that the toolkit’s strings need to be updated to support your language, or
          that your language setting is incorrect.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">The Eclipse help system requires a
          title in the project files generated from your map. Please add a title to your input map to get valid Eclipse
          help output.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">Eclipse uses anchor references to
          connect with other TOC files. For this to work in content generated from a DITA map, the anchorref element
          must reference either an existing Eclipse TOC XML file, or another DITA map (which will presumably also be
          converted to an Eclipse TOC).
          
        </td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">Eclipse builds use DITA’s
            <code class="keyword markupname xmlelement">&lt;navref&gt;</code> element to pull in other Eclipse TOC files. The build found a
            <code class="keyword markupname xmlelement">&lt;navref&gt;</code> element that does not reference any other file; the element will be
          ignored.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">To remove this message, provide a
          navigation title for the referenced object in the map or topic, or ensure that you are referencing a valid
          local DITA target.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">Set the format attribute to identify
          the format of the file. If the reference is to a DITA document, ensure that the document uses a valid DITA
          extension (default supported extensions are "dita" and "xml").</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">The HTML Help compiler will only
          include some types of information in the compiled CHM file; the current reference will not be
          included.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">Ensure that the file exists and can
          be read. <span class="ph">Note that the name of the file in this message may have be changed
            to use a standard dita topic file extension ('.dita' or '.xml'), instead of the original extension used by
            the file; it may also include a path to the temporary directory rather than to the original.</span></td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">To fix the table of contents, specify
          a navigation title in your map or ensure that the referenced file is local and can be accessed. <span class="ph">Note that the name of the file in this message may have be changed
            to use a standard dita topic file extension ('.dita' or '.xml'), instead of the original extension used by
            the file; it may also include a path to the temporary directory rather than to the original.</span>
          
          
        </td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">No title was found in the specified
          topic, so the table of contents will use the indicated fallback value for this topic.
          
          
        </td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">The conref attribute must be a URI
          reference to an existing DITA element. Please see the topic on
          <a class="xref" href="http://docs.oasis-open.org/dita/dita/v1.3/os/part1-base/archSpec/base/uri-based-addressing.html#uri-based-addressing" target="_blank" rel="external noopener">URI-based addressing</a> in the DITA specification for details on the
          expected syntax. <span class="ph" id="errormessages__changeExtension">Note that the name of the file in this message may have be changed
            to use a standard dita topic file extension ('.dita' or '.xml'), instead of the original extension used by
            the file; it may also include a path to the temporary directory rather than to the original.</span>
          <p class="p">If the target element exists in your source file, check to make sure it is not filtered out of the build
            with a DITAVAL file (which will remove the target before conref processing runs).</p></td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">When pulling content with a conref
          attribute, you may only pull from a single element, but the target ID appears twice in the referenced topic.
            <span class="ph">Note that the name of the file in this message may have be changed
            to use a standard dita topic file extension ('.dita' or '.xml'), instead of the original extension used by
            the file; it may also include a path to the temporary directory rather than to the original.</span></td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">This message is deprecated and should
          no longer appear in any logs.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">This may appear if (for example) you
          have a <code class="keyword markupname xmlelement">&lt;ph&gt;</code> element that references another phrase, but that phrase itself contains a
          reference to the original. This will result in an infinite loop. The toolkit will stop following the conref
          trail when this is detected; you will need to correct the reference in your source files. <span class="ph">Note that the name of the file in this message may have be changed
            to use a standard dita topic file extension ('.dita' or '.xml'), instead of the original extension used by
            the file; it may also include a path to the temporary directory rather than to the original.</span></td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">The conref attribute must be a URI
          reference to a DITA element. Please see the topic on
          <a class="xref" href="http://docs.oasis-open.org/dita/dita/v1.3/os/part1-base/archSpec/base/uri-based-addressing.html#uri-based-addressing" target="_blank" rel="external noopener">URI-based addressing</a> in the DITA specification for details on the
          expected syntax.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">The conref attribute must be a URI
          reference to a DITA element. Please see the topic on
          <a class="xref" href="http://docs.oasis-open.org/dita/dita/v1.3/os/part1-base/archSpec/base/uri-based-addressing.html#uri-based-addressing" target="_blank" rel="external noopener">URI-based addressing</a> in the DITA specification for details on the
          expected syntax. <span class="ph">Note that the name of the file in this message may have be changed
            to use a standard dita topic file extension ('.dita' or '.xml'), instead of the original extension used by
            the file; it may also include a path to the temporary directory rather than to the original.</span></td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">This warning is intended to catch
          instances where a non-DITA format setting unexpectedly cascades to a DITA topic, which will prevent the topic
          from being processed. To remove this message, set the format attribute directly on the indicated reference.
            <span class="ph">Note that the name of the file in this message may have be changed
            to use a standard dita topic file extension ('.dita' or '.xml'), instead of the original extension used by
            the file; it may also include a path to the temporary directory rather than to the original.</span></td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">Found a value such as &lt;xref
          href=""&gt;link text&lt;/xref&gt;. The empty href attribute is not serving a purpose and has caused problems with
          some tools in the past; you should remove the attribute entirely or specify a value.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">The type attribute in DITA is
          intended to describe the type of the target; for example, a reference to a concept topic may use
          type="concept". Generally, this attribute is optional, and the DITA-OT build will automatically determine the
          value during processing. In this case, the type attribute lists a more general type than what is actually
          found. This is not an error but may result in unexpected sorting for links to this topic.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">The type attribute in DITA is
          intended to describe the type of the target; for example, a reference to a concept topic may use
          type="concept". Generally, this attribute is optional, and the DITA-OT build will automatically determine the
          value during processing. In this case, the specified type value does not match the target, which may cause
          your links to sort inappropriately.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">DITA-OT is only able to dynamically
          retrieve titles when the target is a local (not peer or external) DITA resource.
          
        </td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">DITA-OT is only able to dynamically
          retrieve titles when the target is a local DITA resource.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">The build was unable to get a title
          from the referenced topic; instead, a navigation title will be created based on the specified
            <code class="keyword markupname xmlelement">&lt;linktext&gt;</code> element inside of <code class="keyword markupname xmlelement">&lt;topicmeta&gt;</code>.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">If the target is a local DITA topic,
          ensure the reference is correct and the topic is available. Otherwise, provide a navigation title, and ensure
          the scope and format attributes are set appropriately.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">DITA-OT is only able to dynamically
          retrieve titles and link text when the target is a local (not peer or external) DITA resource.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">DITA-OT is only able to dynamically
          retrieve titles when the target is a local DITA resource.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">The referenc to this document did not
          specify any link text for generated map-based links; the navigation title will be used as fallback.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">The referenced file did not specify
          any link text for generated map-based links, and no fallback text could be located. Any links generated from
          this reference will have incorrect link text.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">The link or cross reference has no
          target specified and will not generate a link.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">The type attribute in DITA is
          intended to describe the type of the target; for example, a reference to a concept topic may use
          type="concept". Generally, this attribute is optional, and the DITA-OT build will automatically determine the
          value during processing. In this case, the type attribute lists a more general type than what is actually
          found. This is not an error but may result in unexpected sorting for links to this topic.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">The type attribute in DITA is
          intended to describe the type of the target; for example, a reference to a concept topic may use
          type="concept". Generally, this attribute is optional, and the DITA-OT build will automatically determine the
          value during processing. In this case, the specified type value does not match the target, which may cause
          your links to sort inappropriately.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">The build attempted to access the
          specified file in order to retrive a title or short description, but the file could not be found. If the file
          exists, it is possible that a DITAVAL file was used to remove the file’s contents from the build. Be aware
          that the path information above may not match the link in your topic.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">When a link or cross reference does
          not have content, the build will attempt to pull the target’s title for use as link text. If the target is
          unavailable, be sure to set the scope attribute to an appropriate value. If the target does not have a title
          (such as when linking to a paragraph), be sure to provide link text inside the cross reference.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">An <code class="keyword markupname xmlelement">&lt;xref&gt;</code>
          element specifies type="li", which indicates a link to a list item, but the item number could not be
          determined to use as link text. Please specify link text inside the reference, or ensure that you are
          referencing an available list item.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">The cross reference goes to a list
          item in an unordered list. The process could not automatically generate link text because the list item is not
          numbered. Please provide link text within the cross reference.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">An <code class="keyword markupname xmlelement">&lt;xref&gt;</code>
          element specifies type="fn", which indicates a link to a footnote, but the footnote number could not be
          determined to use as link text. Please specify link text inside the reference, or ensure that you are
          referencing an available footnote.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">An <code class="keyword markupname xmlelement">&lt;xref&gt;</code>
          element specifies type="dlentry", which indicates a link to a definition list entry, but the term could not be
          located to use as link text. Please specify link text inside the reference, or ensure that you are referencing
          an available definition list entry</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">No title was found for the current
          document, so the HTML output file will set the <code class="keyword markupname xmlelement">&lt;title&gt;</code> to "***". This value generally
          appears in the title bar at the top of a browser.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">The <code class="keyword markupname xmlelement">&lt;object&gt;</code>
          element in HTML does not support using longdescref for accessibility. To make the object accessible, you may
          need to add text before or after the element. You may also be able to handle it with a
            <code class="keyword markupname xmlelement">&lt;param&gt;</code> element inside the object.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">This message is generated when
          creating draft output in order to help you locate all topics that need to be cleaned up; the cleanup items
          will appear in your output with styling that makes it stand out. The content will be hidden when the draft
          parameter is not active.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">This message is generated when
          creating draft output in order to help you locate all topics that have draft comments. Each comment will
          appear in your HTML output; the comments will be hidden when the draft parameter is not active.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">Because of the way XML and DITA are
          defined, it is generally not possible to prohibit adding a second title to a section during editing (or to
          force that title to come first). However, the DITA specification states that only one title should be used in
          a section. When multiple titles are found, only the first one will appear in the output.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">If it is important to flag this piece
          of information, try placing a flag on the block element that contains your phrase. If you just want to have an
          image next to the phrase, you may place an image directly into the document.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">DITA-OT is able to remove duplicate
          links in most cases. However, if two links to the same resource use different attributes or link text, it is
          possible for them to appear together. For example, if the same link shows up with role="next" and again with
          no specified role, it may show up as both the "Next topic" link and as a related link. Note that links
          generated from a <code class="keyword markupname xmlelement">&lt;reltable&gt;</code> in a DITA map will have the role attribute set to "friend".
          
        </td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">The <code class="keyword markupname xmlelement">&lt;area&gt;</code>
          element in an image map must provide a link target for the specified area. Please add an
            <code class="keyword markupname xmlelement">&lt;xref&gt;</code> element as a child of <code class="keyword markupname xmlelement">&lt;area&gt;</code> and ensure that it
          specifies a link target.
          </td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">Cross reference text inside the
            <code class="keyword markupname xmlelement">&lt;area&gt;</code> element is used to provide accessibility for screen readers that can identify
          different areas of an image map. If text cannot be retrieved automatically by referencing a DITA element, it
          should be specified directly in the cross reference.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">The specified value was passed as-is
          through to the <code class="keyword markupname xmlelement">&lt;area&gt;</code> element in the HTML.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">The area element is intended to
          define a region in an image map; coordinates must be specified in order to define that region.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">The build will not look for peer or
          external topics before compiling your CHM file, so they may not be included. If you are referencing an actual
          HTML file that will not be available, it cannot be included in the project, and you should set the toc
          attribute to "no" on your topicref element. Otherwise, check to be sure your HTML file was included in the
          CHM; if it was not, you will need to place it in the correct location with your other output files and
          recompile.
          
        </td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">The PDF, ODT, and RTF output
          processes cannot automatically convert non-DITA content into DITA in order to merge it with the rest of your
          content. The referenced items are ignored.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">Eclipse requires that an ID be
          specified when creating an Eclipse Help project; the toolkit expects to locate that ID on the root element of
          your input map.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">The toolkit is attempting to add
          generated text, such as the string "Related information" that appears above links. The requested string could
          not be found in any language. Your output may contain a meaningful string, or it may contain a code that was
          intended to map to a string. This likely indicates an error in a plug-in or XSL override; either the string
          was requested incorrectly, or you will need to provide a mapping for the string in all of the languages you
          require.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">This will occur if a map references
          another map, and then that second map (or another further nested map) references the original map. The result
          is an infinite nesting of maps; please correct the chain of map references to remove circular
          reference.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">This will occur when a DITAVAL file
          contains multiple styling rules that apply to the same element.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">The "flagit" named template was
          deprecated in DITA-OT version 1.4, when the OASIS standard formalized the DITAVAL syntax. The template is
          removed in DITA-OT 1.6. Stylesheets that used this template need to be updated.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">The build attempted to access the
          specified file in order to retrive a title or short description, but the file could not be found. If the file
          exists, it is possible that a DITAVAL file was used to remove the file’s contents from the build. Another
          possibility is that the file is located outside of the scope of the main input directory, and was not
          available because the
          <a class="xref" href="../parameters/parameters-base.html" title="Certain parameters apply to all transformations that DITA Open Toolkit supports.">onlytopic.in.map</a> parameter was specified. Be aware that the path
          information above may not match the link in your topic.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">The link appears to use valid syntax
          to reference a DITA element, but that element cannot be found. Please verify that the element exists, and is
          not removed from the build by DITAVAL based filtering.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">Processing for terms, acronyms, or
          abbreviated forms will associate the key from the element’s keyref attribute with a glossentry (glossary
          entry) topic. This message will appear if the key was defined, but was not associated with a glossentry topic.
          The process will try to use the best available fallback (usually the title of the referenced topic).</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">Processing for abbreviated form
          elements will associate the key from the element’s keyref attribute with a glossentry (glossary entry) topic.
          This message will appear if the key was defined, but was not associated with a glossentry topic. This element
          is only supported with keys that are associated with glossary topics; the element will not generate any
          output. Please correct the reference, or use a different element to reference your topic.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">According to the DITA Specification,
          references from maps should either go to DITA Maps, DITA Topics, or any non-DITA resource. References below
          the topic level should only be made from cross references (using <code class="keyword markupname xmlelement">&lt;xref&gt;</code> or similar)
          inside of a topic. For details, see the href attribute description in the OASIS standard’s definition of the
          <a class="xref" href="http://docs.oasis-open.org/dita/v1.2/os/spec/langref/topicref.html" target="_blank" rel="external noopener">topicref element</a>.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">This will appear when generating PDF
          or ODT output that includes a link to a local topic, but the referenced topic is not part of the map itself.
          This will result in a broken link. You should include the topic in your map or remove the link from the
          build.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">The copy-to attribute is used to copy
          a topic over a document that already exists. Please make sure that any copy-to attributes use a unique name so
          that the copy will not overwrite existing content.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">Two different topics are copied to
          the same location using copy-to; as a result, one of these files would be over-written. Only the first
          instance of this copy-to value will be recognized. Please correct the use of copy-to attributes.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">This message indicates that your
          custom XSLT or plug-ins rely on templates that will be removed in an upcoming release. Typically this occurs
          when a named template has been converted to a mode template; any code that uses the deprecated template should
          be updated.</td>
      </tr><tr class="strow">
        <td class="stentry" headers="errormessages__stentry__1">This PDF build uses generated text,
          such as the phrase "Related information" (which is generated above many link groups). The toolkit was unable
          to locate the string <var class="keyword varname">%1</var> for your specified language, so the string will appear in the
          default language. This generally indicates that the toolkit’s strings need to be updated to support your
          language, or that your language setting is incorrect.</td>
      </tr></tbody></table>
    <section class="section"><h2 class="title sectiontitle">Additional explanation for messages in the <span class="ph filepath">org.dita.pdf2</span> plugin</h2>
      
      <table class="simpletable"><colgroup><col style="width:100%"></colgroup><tbody><tr class="strow">
          <td class="stentry">The PDF index process relies on
            pre-defined letter headings when sorting terms. The specified term does not begin with a character that can
            be mapped to an existing heading. Typically this term would be placed in a "Special characters" group, but
            the current language did not specify such a group when setting up the index sort process.</td>
        </tr><tr class="strow">
          <td class="stentry">The PDF index process relies on
            pre-defined letter headings when sorting terms. The specified term does not begin with a character that can
            be mapped to an existing heading, so it has been placed under a heading for terms that begin with special
            characters such as punctuation. If this term should be sorted under a new or existing letter heading, please
            open an issue with DITA-OT to correct the sort.</td>
        </tr><tr class="strow">
          <td class="stentry">Found an
              <code class="keyword markupname xmlelement">&lt;index-see&gt;</code> element as a child of a term that also exists as a standalone index
            term, or as a term that also uses <code class="keyword markupname xmlelement">&lt;index-see-also&gt;</code>. When using
              <code class="keyword markupname xmlelement">&lt;index-see&gt;</code> with an index term, that term should not be used to create page
            references and should not reference additional terms. Treating the <code class="keyword markupname xmlelement">&lt;index-see&gt;</code> as
              <code class="keyword markupname xmlelement">&lt;index-see-also&gt;</code>.</td>
        </tr><tr class="strow">
          <td class="stentry">
            </td>
        </tr></tbody></table>
    </section>
  </div>
</article></main></body></html>